Nonaqueous electrolyte cell
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United States of America Patent
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Issued Date -
Nov 16, 2006
app pub date -
Mar 17, 2004
filing date -
Jun 3, 2003
priority date (Note) -
Abandoned
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Abstract
An object of the present invention is to provide a nonaqueous electrolyte battery which restrains swelling of the battery during high-temperature storage and is excellent in battery performance after storage. The invention is characterized by a specific constitution of a nonaqueous electrolyte and a combination thereof with a positive active material having specific crystal structure and composition. Namely, it is characterized by a nonaqueous electrolyte battery containing a positive electrode, a negative electrode, and a nonaqueous electrolyte, wherein the above nonaqueous electrolyte contains at least a cyclic carbonate having a carbon-carbon .pi. bond and the above positive electrode contains a positive active material comprising a composite oxide represented by a composite formula: Li.sub.xMn.sub.aNi.sub.bCO.sub.cO.sub.2 (wherein 0.ltoreq.x.ltoreq.1.1, a+b+c=1, |a-b|<0.05, 0
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